JP2011048232A - Optical system enabling short-distance photography and optical device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical system that can move for focusing at high speed from an infinity object to equal magnification and has excellent optical performance, and an optical device using the same; and to provide a compact optical system that can carry out image stabilization when the optical system is vibrated and has excellent optical performance from the infinity object to equal magnification, and an optical device using the same. <P>SOLUTION: The optical system includes a first focus lens group moving by a different moving amount in an optical axis direction when focusing from the infinity object to a short-distance object, a second focus lens group and a third focus lens group, wherein at least one focus lens group comprises a single lens. The optical system includes the first focus lens group, an image-stabilizing lens group arranged on an image side of the first focus lens group and moved in a perpendicular direction to an optical axis to carry out image stabilization when the optical system is vibrated, and the second focus lens group on the image side of the image-stabilizing lens group. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a so-called macro lens that can perform close-up shooting from an object at infinity to a shooting magnification of the same magnification, and is particularly suitable for an optical apparatus such as a still camera, a video camera, and a digital camera.

  Conventionally, Patent Document 1 discloses a macro lens that can shoot up to the same magnification as a photographic magnification by moving three lens groups during focusing from an infinitely distant object to a close object with a photographic lens for a still camera. In the lens according to the publication, each of the three lens groups that move during focusing is composed of a plurality of lenses.

  In addition, when focusing from an infinite object to a close object, multiple lens groups are moved, and during focusing, a part of the lens group fixed in the optical axis direction is moved in the direction perpendicular to the optical axis to vibrate the optical system. Patent Documents 2 and 3 disclose macro lenses that can correct image blur at the time.

JP 2000-231056 A Japanese Patent No. 4194297 JP 2003-322797 A

  Macro lenses that can shoot from an object at infinity to the same magnification as the photographic magnification tend to increase the amount of movement of the lens group that moves during focusing, and in order to achieve high-speed focusing with a focusing motor, the lens group that moves during focusing It is desirable to reduce the weight. However, in the lens described in Patent Document 1, each of the three lens groups that move during focusing is composed of a plurality of lenses, and the lens group that moves during focusing does not become lighter and moves focusing at high speed. It was difficult to do.

  SUMMARY OF THE INVENTION A first object of the present invention is to provide an optical system that can move at high speed from an object at infinity to a shooting magnification equal to the same magnification and that has good optical performance, and an optical apparatus using the same.

  In addition, a macro lens that can shoot from an infinitely distant object to the same magnification will move multiple lens groups during focusing from a distant object to a close object in order to improve the performance up to a short distance. However, if an image blur correcting lens group is arranged to correct image blur when the optical system vibrates, it is difficult to reduce the size of the lens system or to achieve good optical performance. In any of the lenses described in Patent Document 2 and Patent Document 3, the lens is sufficiently small and good optical performance is not obtained.

  The second object of the present invention is to provide an optical system that is small in size and capable of correcting image blurring when the optical system vibrates and has good optical performance from an object at infinity to a magnification equal to the photographing magnification, and an optical device using the optical system. It is to be.

  In order to achieve the above object, the optical system of the present invention is characterized in that a plurality of lens groups are moved differently during focusing, and the arrangement of the focus lens group and the image blur correcting lens group is appropriately set.

For example, a first focus lens group that moves in the optical axis direction during focusing from an object at infinity to a near object;
A second focus lens group that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
A third focus lens group that moves during focusing with a movement amount different from any of the movement amounts of the first focus lens group and the second focus lens group;
At least one focus lens group among the focus lens groups has a single lens configuration.

Further, for example, when focusing from an object at infinity to a near object, a first focus lens group having a negative refractive power that moves in the optical axis direction; and
A second focus lens group having a positive refractive power that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
The first focus lens group has at least one positive lens;
The Abbe number of the positive lens is Vp,
The second focus lens group includes at least one negative lens;
When the Abbe number of the negative lens is Vn, 15.8 <Vp <22.9
Vp <Vn
It satisfies the following conditional expression.

Also, for example, a first focus lens group that moves in the optical axis direction during focusing from an object at infinity to a near object;
An image blur correction lens group that is disposed closer to the image side than the first focus lens group and moves in a direction perpendicular to the optical axis to correct image blur when the optical system vibrates;
It is characterized in that a second focus lens group that moves during focusing with a movement amount different from the movement amount of the first focus lens group is provided on the image side of the image blur correction lens group.

  An optical device according to the present invention includes the above optical system and means for receiving an optical image formed by the optical system.

  According to the present invention, it is possible to provide an optical system capable of focusing at a high speed from an object at infinity to a photographing magnification of equal magnification and having an excellent optical performance, and an optical apparatus using the optical system.

  In addition, according to the present invention, there is provided an optical system that is small in size and capable of correcting image blurring when the optical system vibrates and has good optical performance from an object at infinity to a magnification equal to the photographing magnification, and an optical device using the optical system. be able to.

Lens arrangement diagram of optical system according to Embodiment 1 (Example 1) Longitudinal aberration diagram of the optical system according to Example 1 FIG. 5 is a lateral aberration diagram in a basic state where image blur correction is not performed and in an image blur correction state at an infinite object distance of the optical system according to the first embodiment. Lens arrangement diagram of optical system according to Embodiment 2 (Example 2) Longitudinal aberration diagram of the optical system according to Example 2 Lateral aberration diagrams in the basic state where image blur correction is not performed and in the image blur correction state when the object distance of the optical system according to Example 2 is infinite Lens arrangement diagram of optical system according to Embodiment 3 (Example 3) Longitudinal aberration diagram of the optical system according to Example 3 Lateral aberration diagrams in a basic state where image blur correction is not performed and in an image blur correction state at an infinite object distance of the optical system according to the third embodiment 1 is a schematic configuration diagram of an optical device according to the present invention.

(Embodiments 1 to 3)
Embodiments 1, 2, and 3 of the present invention are described below with reference to the drawings.

  1, 4, and 7, (a) is a lens arrangement diagram in a focused state at an object distance of infinity, and (b) is a lens in a focused state at an intermediate distance where the photographing magnification is 0.5 times. The layout diagram, (c) shows the lens layout diagram in the focused state at the shortest shooting distance where the shooting magnification is equal. 1, 4, and 7, the broken line arrows provided between FIGS. 1A and 1B are straight lines obtained by connecting the positions of the lens groups in the respective states. Each state is simply connected by a straight line, which is different from the actual movement of each lens group.

  In FIGS. 1, 4, and 7, an asterisk * attached to a specific surface indicates that the surface is an aspherical surface. In each figure, a symbol (+) and a symbol (−) attached to a symbol of each lens group correspond to a refractive power symbol of each lens group. Furthermore, in each figure, the straight line described on the rightmost side represents the position of the image plane S. Although not shown, when the optical system of the present invention is used in a digital camera, an optical low-pass filter, a face plate of an image sensor, or the like is disposed between the final lens group (G6) and the image plane S. Further, in each drawing, an aperture stop A is provided on the image side of the third lens group G3 through an air interval that does not change during focusing.

  2, 5, and 8 are longitudinal aberration diagrams of the optical systems according to Numerical Examples 1, 2, and 3, respectively.

  In each longitudinal aberration diagram, (a) is in focus at an object distance of infinity, (b) is in focus at an intermediate distance where the shooting magnification is 0.5, and (c) is at shooting magnification, etc. Each aberration in the focused state is represented by the shortest shooting distance that is doubled. Each longitudinal aberration diagram shows spherical aberration (SA (mm)), astigmatism (AST (mm)), and distortion (DIS (%)) in order from the left side. In the spherical aberration diagram, the vertical axis represents the F number (indicated by F in the figure), the solid line is the d line (d-line), the short broken line is the F line (F-line), and the long broken line is the C line (C- line). In the astigmatism diagram, the vertical axis represents the image height (indicated by H in the figure), the solid line represents the sagittal plane (indicated by s), and the broken line represents the meridional plane (indicated by m in the figure). is there. In the distortion diagram, the vertical axis represents the image height (indicated by H in the figure).

  The optical system of each embodiment includes, in order from the object side to the image side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a third lens group having a positive refractive power. G3, a fourth lens group G4 having a positive refractive power, a fifth lens group G5 having a negative refractive power, and a sixth lens group G6 having a weak refractive power.

The first lens group G1 has an aspherical final surface,
The second lens group G2 has one positive lens,
The third lens group G3 has a single positive lens configuration,
The fourth lens group G4 has one negative lens,
The fifth lens group G5 has a single negative lens configuration.
The sixth lens group G6 has a two-lens configuration of a negative lens having a concave surface directed toward the object side and a positive lens having a convex surface directed toward the image side in order from the object side.

  By configuring the sixth lens group G6 to have the above configuration, it is possible to favorably correct field curvature. Further, it is possible to make a telecentric optical system on the image side, which is preferable when this optical system is used in a digital camera.

  In the optical system of each embodiment, the first lens group G1, the third lens group G3, and the sixth lens group G6 are in the image plane during focusing from the in-focus state at the infinite object distance to the in-focus state at the shortest shooting distance. The second lens group G2 is moved almost monotonically to the image plane side, the fourth lens G4 is moved almost monotonically to the object side, and the fifth lens group G5 is moved to the fourth lens group. The movement is different from that of G4.

  The above lens group configuration and focusing method realize good optical performance from an object at infinity to the same magnification as the photographing magnification, and an optical system with good operability that does not change the overall length during focusing and an optical device using the same. realizable.

  In the optical systems of the above embodiments, the fifth lens group G5 is composed of a single lens element, whereby the weight of the focus lens group and high-speed response are realized.

  In the optical system of each embodiment, the third lens group G3 is moved in the direction perpendicular to the optical axis in order to correct image blur when the optical system vibrates.

  By placing lens groups that move during focusing on the object side and the image side of the third lens group G3, which is an image blur correction lens group, optical performance at the time of image blur correction from an infinite object to the same magnification as the photographing magnification is improved. can do.

  In order to reduce the lens diameter of the third lens group G3, it is preferable to dispose the stop A adjacent to the third lens group G3 that is the image blur correction lens group.

  FIG. 3 shows lateral aberration in the in-focus state at an object distance of infinity in the optical system of the first embodiment. The lateral aberration in the basic state where the image blur correction is not performed and in the image blur correction state, and the optical system. The lateral aberration is shown when image blur correction is performed by moving the third lens group G3 by 0.50 mm in the direction perpendicular to the optical axis with the whole tilted by 0.36 °.

  FIGS. 6 and 9 show lateral aberrations in the in-focus state at an object distance of infinity in the optical systems of Examples 2 and 3, respectively. In the basic state in which image blur correction is not performed, the lateral aberration in the image blur correction state. The lateral aberration is shown in a state where image blur correction is performed by moving the third lens group G3 by 0.50 mm with the entire optical system tilted by 0.30 °.

  In each lateral aberration diagram, the upper three aberration diagrams correspond to the basic state where image blur correction is not performed, and the lower three aberration diagrams correspond to the image blur correction state. Of the lateral aberration diagrams in the basic state, the upper row shows the lateral aberration at the image point of 70% of the maximum image height, the middle row shows the lateral aberration at the axial image point, and the lower row shows the lateral aberration at the image point of -70% of the maximum image height. Respectively. In each lateral aberration diagram in the image blur correction state, the upper stage is the lateral aberration at the image point of 70% of the maximum image height, the middle stage is the lateral aberration at the axial image point, and the lower stage is at the image point of -70% of the maximum image height. Each corresponds to lateral aberration. In each lateral aberration diagram, the horizontal axis represents the distance from the principal ray on the pupil plane, the solid line is the d line (d-line), the short broken line is the F line (F-line), and the long broken line is the C line ( C-line) characteristics.

  Hereinafter, conditions that the optical system according to each embodiment should satisfy will be described. In the optical system according to each embodiment, a plurality of conditions to be satisfied are defined, but an optical system configuration that satisfies as many conditions as possible is most desirable. However, by satisfying individual conditions, it is possible to obtain optical systems that exhibit corresponding effects.

  It is desirable that the optical system according to each embodiment satisfies the following conditions.

A first focus lens group having a negative refractive power that moves in the optical axis direction during focusing from an object at infinity to a near object;
A second focus lens group having a positive refractive power that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
The first focus lens group has at least one positive lens;
The Abbe number of the positive lens is Vp,
The second focus lens group includes at least one negative lens;
When the Abbe number of the negative lens is Vn 15.8 <Vp <22.9 (1)
Vp−Vn <0.0 (2)
It is desirable to satisfy the following conditional expression.

  If the dispersion exceeds the upper limit of conditional expression (1), it becomes difficult to correct chromatic aberration in the first focus lens group, and the number of lenses increases for correcting chromatic aberration. More desirably, the upper limit is set to 21.8, and further to 20.8. In general, highly dispersive materials have extremely low short-wavelength transmittance, and when the dispersibility exceeds the lower limit, it becomes difficult to maintain good color balance. More preferably, the lower limit is set to 16.8.

  Conditional expression (2) relates to the Abbe number of the positive lens of the first focus lens group and the negative lens of the second focus lens group, and in order to correct chromatic aberration, both lenses should be made of a highly dispersed material. However, if the upper limit is exceeded, both lenses become a highly dispersed material with extremely low short wavelength transmittance, making it difficult to maintain good color balance.

The image blur correction lens group is composed of one positive lens, and when the Abbe number of the positive lens is Vp3, 30.5 <Vp3 <82.5 (3)
It is desirable to satisfy the following conditional expression.

  Conditional expression (3) relates to the dispersion of the positive lens of the image blur correction lens group, and the image blur correction lens group is a single lens arranged between the first focus lens group and the second focus lens group. In this case, it is not desirable to use a highly dispersed material in order to reduce color misalignment during image blur correction. If the dispersion exceeds the lower limit of the conditional expression (3), the color shift becomes large, which is not desirable. More preferably, the lower limit is set to 34.3, and further to 39.5. Exceeding the upper limit is not preferable because it results in an ultra-low dispersion material and a very expensive material.

The focal length of the entire optical system focused on an object at infinity is f,
When the focal length of the third lens group is f3, 0.8 <f3 / f <3.2 (4)
It is desirable to satisfy the following conditional expression.

  Conditional expression (4) relates to the focal length of the third lens group, but in order from the object side is a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens having a positive refractive power. A lens group, a fourth lens group having a positive refractive power, a fifth lens group having a negative refractive power, and a sixth lens group having a positive refractive power or a negative refractive power. When the first lens group, the third lens group, and the sixth lens group are fixed in the optical axis direction with respect to the image plane, and the second lens group, the fourth lens group, and the fifth lens group move. If the refractive power of the third lens unit becomes stronger beyond the lower limit of conditional expression (4), the number of lenses constituting the third lens unit will increase to correct spherical aberration. Desirably, the lower limit is set to 1.0, and further to 1.2. If the refractive power is weakened beyond the upper limit, when the third lens group is an image blur correction lens, the amount of movement in the direction perpendicular to the optical axis for image blur correction increases, and the lens diameter increases. . The upper limit is preferably 2.6, and more preferably 2.1.

(Embodiment 4)
FIG. 10 is a schematic configuration diagram of the optical device according to the first, second, and third embodiments.

  The optical device 100 according to the present embodiment includes a camera body 101 and an interchangeable lens device 201 that is detachably connected to the camera body 101.

  The camera body 101 receives an optical image formed by the lens system 202 of the interchangeable lens apparatus 201 and converts it into an electrical image signal, and a liquid crystal that displays the image signal converted by the image sensor 102. A monitor 103 and a camera mount unit 104 are included. On the other hand, the interchangeable lens device 201 includes a lens system 202 according to any one of the first to third embodiments, a lens barrel that holds the lens system 202, and a lens mount unit connected to the camera mount unit 104 of the camera body. 204. The camera mount unit 104 and the lens mount unit 204 electrically connect not only a physical connection but also a controller (not shown) in the camera body 101 and a controller (not shown) in the interchangeable lens device 201. It also functions as an interface that enables mutual signal exchange.

  Hereinafter, numerical examples in which the optical systems according to Embodiments 1 to 3 are specifically implemented will be described. As will be described later, Numerical Examples 1 to 3 correspond to Embodiments 1 to 3, respectively. In each numerical example, the units of length are all “mm”. In each numerical example, r is a radius of curvature, d is a surface interval, nd is a refractive index with respect to the d line, and vd is an Abbe number with respect to the d line. In each numerical example, the surface marked with * is an aspherical surface, and the aspherical shape is defined by the following equation.

  However, the items represented by the terms in the formula are as follows.

Z: distance from a point on the aspherical surface whose height from the optical axis is h to the tangent plane of the aspherical vertex h: height from the optical axis r: vertex radius of curvature κ: conic constant An: n-th non-dimensional Spherical coefficient (Numerical example 1)
The optical system of Numerical Example 1 corresponds to Embodiment 1 shown in FIG.
Focal length = 45.90 2ω = 26.3 °
Surface data Surface number rd nd vd
1 -638.97800 1.54400 1.77250 49.6
2 -63.91990 0.20000
3 22.70370 0.80000 1.92286 20.9
4 14.59950 3.78380 1.74330 49.3
5 * 254.94710 Variable
6 -114.65930 0.80000 1.91082 35.2
7 19.26630 1.29610
8 171.12040 0.80000 1.56883 56.0
9 15.79480 2.47420 1.94595 18.0
10 33.83050 Variable
11 101.31670 1.88250 1.67790 55.5
12 -92.86470 0.50000
13 ∞ 1.29820
14 (Aperture) ∞ 1.30180
15 ∞ Variable
16 * 24.52360 3.53680 1.74330 49.3
17 * -126.58720 0.20000
18 73.43350 1.21640 1.80518 25.5
19 13.35190 4.40870 1.69680 55.5
20 -137.43960 Variable
21 37.23370 0.80000 1.49700 81.6
22 11.76600 Variable
23 -14.97250 0.80000 1.61800 63.4
24 304.88010 0.15070
25 57.68760 3.99790 1.80610 40.7
26 -27.68910 BF
Aspheric data 5th surface
K = 0.00000E + 00, A4 = 2.58659E-06, A6 = -2.48230E-09, A8 = -1.32418E-11
A10 = 1.78428E-14
16th page
K = 0.00000E + 00, A4 = -4.59714E-06, A6 = -1.21672E-08, A8 = 8.36980E-12
A10 = -2.50770E-13
17th page
K = 0.00000E + 00, A4 = 8.51325E-07, A6 = 8.94394E-09, A8 = -7.13504E-11
A10 = 2.51833E-14
Variable interval and F number according to focus state
Infinite × 0.50 × 1.03
F number 2.92 4.37 5.82
d5 1.3344 5.8240 8.2070
d10 8.4016 3.8960 1.5263
d15 12.4314 6.9108 0.5000
d20 0.9527 3.5058 8.9085
d22 10.5314 13.5084 14.5174
BF 15.04245 15.04322 15.04462
(Numerical example 2)
The optical system of Numerical Example 2 corresponds to Embodiment 2 shown in FIG.
Focal length = 45.90 2ω = 26.4 °
Surface data Surface number rd nd vd
1 642.26970 1.43740 1.77250 49.6
2 -89.72320 0.20000
3 21.08090 0.80000 1.92286 20.9
4 13.88670 3.68240 1.74330 49.3
5 * 107.23500 variable
6 -1629.50830 0.80000 1.88300 40.8
7 19.62440 1.37790
8 -3299.49490 0.80000 1.58144 40.9
9 15.79410 1.71010 1.94595 18.0
10 32.81280 Variable
11 94.65010 1.75090 1.61800 63.4
12 -111.56000 0.50000
13 ∞ 1.29610
14 (Aperture) ∞ 1.30390
15 ∞ Variable
16 * 25.71270 3.27890 1.74330 49.3
17 * -64.58190 0.20000
18 38.03620 0.81680 1.80518 25.5
19 12.05380 4.10290 1.69680 55.5
20 55.14270 Variable
21 29.24020 0.80000 1.48749 70.4
22 12.15830 Variable
23 -21.59800 0.80000 1.78590 43.9
24 34.94590 0.00750
25 30.94440 5.56390 1.80610 33.3
26 -29.61420 BF
Aspheric data 5th surface
K = 0.00000E + 00, A4 = 4.06894E-06, A6 = 4.33467E-09, A8 = -7.29301E-11
A10 = 4.60085E-14
16th page
K = 0.00000E + 00, A4 = -1.70560E-06, A6 = -6.41196E-08, A8 = 3.35239E-10
A10 = 1.15316E-14
17th page
K = 0.00000E + 00, A4 = 9.33419E-06, A6 = -5.80439E-08, A8 = 3.09084E-10
A10 = 2.15739E-13
Variable interval and F number according to focus state
Infinite × 0.5 × 1.00
F number 2.92 4.37 5.82
d5 1.8334 5.9903 9.5384
d10 9.2728 5.1212 1.5798
d15 12.8901 6.1207 0.5000
d20 1.5061 4.5876 8.9686
d22 6.3225 10.0033 11.2451
BF 15.07015 15.07040 15.07111
(Numerical Example 3)
The optical system of Numerical Example 3 corresponds to Embodiment 3 shown in FIG.
Focal length = 45.90 2ω = 26.5 °
Surface data Surface number rd nd vd
1 85.59320 1.55800 1.51680 64.2
2 -271.12050 0.15000
3 23.58360 0.80000 1.92286 20.9
4 14.77410 4.40840 1.76930 49.3
5 * -243.93860 Variable
6 ∞ 0.80000 1.91082 35.2
7 20.96750 1.48410
8 -104.14150 0.80000 1.91082 35.2
9 14.79660 2.35470 1.94595 18.0
10 88.13310 Variable
11 100.00000 1.80840 1.72916 54.7
12 -100.00000 0.50000
13 ∞ 1.30000
14 (Aperture) ∞ 1.30000
15 ∞ Variable
16 48.42080 3.29920 1.77250 49.6
17 -96.22290 0.15000
18 65.97500 0.80000 1.84666 23.8
19 16.71380 4.20100 1.72916 54.7
20 -160.77180 0.15000
21 49.84430 2.88490 1.49700 81.6
22 -113.82110 Variable
23 -75.77480 0.80000 1.48749 70.4
24 16.07660 Variable
25 -17.34990 0.75000 1.48749 70.4
26 34.99840 3.62640 1.83481 42.7
27 -40.55440 BF
Aspheric data 5th surface
K = 0.00000E + 00, A4 = 9.64948E-06, A6 = -3.28988E-08, A8 = 3.85170E-10
A10 = -2.58623E-12
Variable interval and F number according to focus state
Infinite × 0.50 × 1.00
F number 2.89 4.32 5.75
d5 1.7316 5.4823 9.2513
d10 9.0043 5.2277 1.4853
d15 10.5737 4.9689 1.0908
d22 2.0973 4.7756 8.3665
d24 7.0600 10.0034 10.2794
BF 15.01368 15.04600 15.00427
Table 1 below shows corresponding values of the conditional expressions in the optical system according to each numerical example.

  The present invention relates to a so-called macro lens that can perform close-up shooting from an object at infinity to a shooting magnification of the same magnification, and is particularly suitable for an optical apparatus such as a still camera, a video camera, and a digital camera.

G1 1st lens group G2 2nd lens group G3 3rd lens group G4 4th lens group G5 5th lens group G6 6th lens group L1 1st lens element L2 2nd lens element L3 3rd lens element L4 4th lens element L5 5th lens element L6 6th lens element L7 7th lens element L8 8th lens element L9 9th lens element L10 10th lens element L11 11th lens element L12 12th lens element L13 13th lens element L14 14th lens element A Aperture stop S Image surface 100 Optical device 101 Camera body 102 Image sensor 103 Liquid crystal monitor 104 Camera mount unit 201 Interchangeable lens device 202 Lens system 204 Lens mount unit

Claims (11)

A first focus lens group that moves in the optical axis direction during focusing from an object at infinity to a near object;
A second focus lens group that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
A third focus lens group that moves during focusing with a movement amount different from any of the movement amounts of the first focus lens group and the second focus lens group;
An optical system capable of close-up photography, wherein at least one of the focus lens groups has a single lens configuration. A first focus lens group having a negative refractive power that moves in the optical axis direction during focusing from an object at infinity to a near object;
A second focus lens group having a positive refractive power that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
The first focus lens group has at least one positive lens;
The Abbe number of the positive lens is Vp,
The second focus lens group includes at least one negative lens;
When the Abbe number of the negative lens is Vn, 15.8 <Vp <22.9
Vp−Vn <0.0
An optical system capable of photographing at close range, which satisfies the following conditional expression: A first focus lens group that moves in the optical axis direction during focusing from an infinitely distant object to a close object;
An image blur correction lens group that is disposed closer to the image side than the first focus lens group and moves in a direction perpendicular to the optical axis to correct image blur when the optical system vibrates;
An optical system capable of photographing at close range, comprising a second focus lens group that moves at the time of focusing with a movement amount different from the movement amount of the first focus lens group on the image side of the image blur correction lens group. system. A first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a first lens group having a negative refractive power in order from the object side. It is composed of 5 lens groups and a 6th lens group with positive or negative refractive power,
The first lens group, the third lens group, and the sixth lens group are fixed in the optical axis direction with respect to the image plane during focusing from an object at infinity to an object at a short distance,
The optical system according to any one of claims 1 to 3, wherein the second lens group, the fourth lens group, and the fifth lens group move. The image blur correction lens group is composed of one positive lens,
When the Abbe number of the positive lens is Vp3, 30.5 <Vp3 <82.5
The optical system according to claim 1, wherein the following conditional expression is satisfied.   6. The optical system according to claim 5, wherein a stop is disposed adjacent to the image blur correcting lens group.   The sixth lens group has a configuration in which the most object-side surface is concave on the object side and the most image-side surface is convex on the image side, or two negative lenses and a positive lens in order from the object side. The optical system according to claim 4. The focal length of the entire optical system focused on an object at infinity is f,
When the focal length of the third lens group is f3, 1.5 <f3 / f <3.5
The optical system according to claim 4, wherein the following conditional expression is satisfied. A first focus lens group that moves in the optical axis direction during focusing from an object at infinity to a near object;
A second focus lens group that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
A third focus lens group that moves during focusing with a movement amount different from any of the movement amounts of the first focus lens group and the second focus lens group;
An optical apparatus using an optical system capable of close-up photography, wherein at least one of the focus lens groups has a single lens configuration. A first focus lens group having a negative refractive power that moves in the optical axis direction during focusing from an object at infinity to a near object;
A second focus lens group having a positive refractive power that moves during focusing with a movement amount different from the movement amount of the first focus lens group;
The first focus lens group has at least one positive lens;
The Abbe number of the positive lens is Vp,
The second focus lens group includes at least one negative lens;
When the Abbe number of the negative lens is Vn, 15.8 <Vp <22.9
Vp−Vn <0.0
An optical device using an optical system capable of photographing at close range that satisfies the following conditional expression. A first focus lens group that moves in the optical axis direction during focusing from an infinitely distant object to a close object;
An image blur correction lens group that is disposed closer to the image side than the first focus lens group and moves in a direction perpendicular to the optical axis to correct image blur when the optical system vibrates;
An optical apparatus using a short-distance photographing optical system having a second focus lens group that moves during focusing with a movement amount different from the movement amount of the first focus lens group closer to the image side than the image blur correction lens group .

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